. >> now, a london-based group is trying to change that. >> can these men stop global companies from dodging taxes around the world? tax officials from australia, britain, and china analyze complex schemes to reduce company tax burdens. this one leaves from england to australia, taking advantage of tax havens along the way. the authority of tax officials often ends at the border. investigators request information from authorities and other countries, but it is often not enough. >> when you start looking at very complex affairs, then a simple letter is rarely sufficient to fully explore the issues. by working together, we are able to understand the cultural differences that exist between our different countries. >> in britain, u.s. coffeehouse starbucks sparked outrage when it was revealed the company paid very little tax in the u.k. its trick was to pay high licensing fees to reduce its corporate tax rate. activists say starbucks is no exception. >> there's a lot of online-based companies like amazon, google, facebook, that are avoiding tax, which is outrageous. >> apple, for example